RiverFish

Bleak · Alburnus alburnus

Bleak in the River Cherwell

Largest measured bleak: 17.3 cm

The largest bleak measured in Environment Agency surveys of the River Cherwell was 17.3 cm, recorded at Shipton-on-Cherwell (Margin) on 4 June 2013.

Across 2,850 measured bleak, the median measured length was 9.5 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the River Cherwell.

See bleak records across England →

Most recent observation11 June 2025Shipton-on-Cherwell (Margin) · 81 fish
Largest measured bleak
17.3 cm
Median length
9.5 cm
Fish measured
2,850
Survey locations
24

Individual EA measurements

Largest measured bleak

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
17.3 cm4 Jun 2013Shipton-on-Cherwell (Margin)136239
17 cm22 Aug 2007Shipton-on-Cherwell (Margin)106511
16.5 cm2 Oct 2009Thrupp to Hampton Poyle119121
16.3 cm7 Jun 2023Islip162408
16.2 cm29 May 2019Gosford bridge154519
16.1 cm26 May 2010Marston121724
15.6 cm3 Nov 2010Thrupp to Hampton Poyle124949
15.3 cm14 Jun 2022Gosford bridge161075
15.3 cm2 Jun 2016Gosford bridge148324
15.3 cm2 Oct 2009Thrupp to Hampton Poyle119121

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where bleak were found

Each point marks a survey location with at least one bleak record.

Choose a point on the map to see what was recorded there.

Map points are approximate and don’t show fishing access. Check local permissions before visiting.

Place surveyedFirst recordedLast recordedVisits finding bleak
Shipton-on-Cherwell (Margin)3 Aug 200111 Jun 202519
Islip3 Oct 200210 Jun 202515
Gosford bridge21 Aug 200110 Jun 202520
Upstream Twyford8 Jun 20234 Jun 20242
Somerton Boat4 Jun 20244 Jun 20241
Oxford University Parks14 Jun 201714 Jun 20233
Downstream Somerton8 Jun 20238 Jun 20231
Twyford mill21 May 20049 Jun 202212
Somerton16 Jun 200425 May 20177
Spiceball park10 Jun 201423 May 20172
Marston27 Jul 200423 Jun 201611
Angel and Grayhound Meadows7 Oct 20147 Oct 20141
Downstream River Ray near Islip19 Sept 201419 Sept 20141
Tackley B27 May 201127 May 20111
Tackley8 Nov 20108 Nov 20101
Thrupp to Hampton Poyle2 Oct 20083 Nov 20103
Hampton Poyle to Gosford Weir2 Oct 20082 Oct 20081
Weir stream at Shipton on Cherwell22 May 200822 May 20081
Lower Heyford24 Jun 20046 Jun 20063
Marston - Angling Match12 Oct 200329 Oct 20052
Rock of Gibralter27 Jul 200427 Jul 20052
Northbrook24 Aug 200114 Jun 20054
St Clements Stream10 Jul 200310 Jul 20031
Shipton-on-Cherwell (Middle)19 Sept 200224 Jun 20032

Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.

2001–2025

Survey records by year

Each bar shows how many survey visits recorded bleak that year.

Fish measured by surveyors

Measured length distribution

See how the 2,850 measured fish were spread across different length ranges.

Smallest
3.6 cm
Lower quarter
7.8 cm
Median
9.5 cm
Upper quarter
11.1 cm
Largest
17.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Cherwell

Compare other species with enough survey and measurement data for a detailed page.

Roach Pike Perch Chub Dace Gudgeon

Before you fish

Good to know

These are past survey records, so the fish present today may be different. Map points are approximate—check local access, permissions and fishing rules before visiting.

Learn how RiverFish uses the data →